Unc Chapel Hill Application University Of North Carolina Admissions 2026

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3、适用情况 unc用于机械零件之间的连接和紧固，一般 螺纹连接 多用粗牙螺纹。 unf细牙一般用在需要防松动的地方。 细牙螺纹旋入的牙数更多，即可以起到降低流体泄露的作用，因此用在需要密封. Un,unf,unc;是英寸制统一螺纹的识别 un是英文unified national的缩写，属于统一螺纹的恒定螺距系列。unf是英文unified national fine的缩写，是统一螺纹细牙系列。unc是英文unified national.

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Un,unf,unc,螺纹之间是怎样区别的？un, unf, 和 unc 螺纹是美国标准中常见的三种螺纹类型，用于表示不同精度和用途的螺纹规格。它们的区别主要在于牙型、牙距和公差等级。un, 或.

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